One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,4,8)(9,10,13,14)(11,15,12,16)(18,23)(19,26)(20,22)(24,31)(27,29)(30,32)(2,6)(7,8)(10,14)(11,12)(17,18,21,23)(19,24,27,30)(20,28,22,25)(26,32,29,31)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,19)(18,24)(20,26)(21,27)(22,29)(23,30)(25,31)(28,32)(1,4,5,3)(2,8,6,7)(11,12)(15,16)(17,20,21,22)(18,25,23,28)(19,26,27,29)(24,31,30,32)(9,12,13,11)(10,16,14,15)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.